Chris Froome concentrating on Nibali but admits Lopez could become a threat at Vuelta a España
Colombian rider moves up to sixth overall after winning stage 15
Chris Froome crosses the line on stage 15 of the Vuelta a España (Credit: Sunada)Chris Froome has few things to worry about at the 2017 Vuelta a España, mainly just concentrating on Vincenzo Nibali on Sunday's stage 15 to Sierra Nevada.
